What makes a note sharp? If a note has a sharp symbol (♯) to the left of it, that is an indication that the note is sharp..When a note is sharp it is a half step higher than the note is in its natural position. Notes are considered "natural" if they have no accidentals (flats or sharps) in front of them. (Of course, if there are flats or sharps in the key signature then whatever accidentals are in the signature apply to the notes.)
Steps are the intervals between notes. The smallest step between notes is a half step .Whole steps are comprised of two half steps.